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Tired of inaccurate and laborious pH measurements in your laboratory or fieldwork?

Discover the precision of the Starter 300 pH Portable by Ohaus, a reliable solution brought to you by Liberty Scales. This portable pH meter delivers highly accurate readings, streamlining water analysis, metering, and electrode management. It's designed to tackle the complexities of laboratory instruments and field conditions, ensuring that your measurements are both effortless and precise.

Key Benefits:

  • Enhanced Accuracy: With an expansive measurement range of 0 – 14.00 pH and automatic temperature compensation, expect exact results every time, regardless of environmental variations.
  • User-Friendly Features: Auto buffer recognition and a calibration icon simplify the calibration process, virtually eliminating human error and reducing setup time.
  • Convenient Data Management: A built-in 30-measurement library allows you to store and easily access past data, facilitating better tracking and analysis of your results.
  • Robust Design: Equipped with a durable ABS housing and an IP54 rating, the Starter 300 is designed for rigorous use in both laboratory and field environments, resistant to dust and water splashes.
  • Portable and Ready to Use: Powered by four AAA batteries and featuring a compact, ergonomic design with a wrist strap, this meter is ready for on-the-go measurements anywhere your research takes you.
  • 5-Year Warranty: Enjoy peace of mind and long-term reliability with a comprehensive 5-year warranty on your investment.

By choosing the Starter 300 pH Portable, you’re not just buying a pH meter; you’re investing in peace of mind. With the backing of Liberty Scales' precision engineering, feel confident in your water analysis tasks, knowing that you have a tool that performs consistently under any conditions. Imagine the satisfaction of obtaining reliable, quick, and easy measurements every time, enhancing your productivity and the credibility of your results. Say goodbye to the frustrations of inconsistent data and embrace the ease of the Starter 300 pH Portable.

Reach out to our dedicated team for further information and personalized assistance. Call us at (661) 888-1919 or email us at We're here to help you every step of the way!


  • Measurement Range: 0 – 100°C; 0.00 – 14.00 pH; -1999 – 1999 mV

  • Accuracy: ±0.5 °C; ±1 mV; ±0.01 pH

  • Measurement Resolution: 0.1 °C; 0.01 pH; 1 mV

  • Display: LCD

  • Electrode: ST322(Included)

  • Accuracy ± (mV): 1 mV

  • Accuracy ± (Temperature): 0.5 °C

  • Battery Life: 500 Hours with Disposable Batteries

  • Calibration: 3 Point

  • Dimensions: 6.69 in x 1.38 in x 3.54 in (170 mm x 33 mm x 90 mm) (LxHxW)

  • In-Use Cover: No

  • Measurement Range (Temperature): 0 °C – 100 °C

  • Measurement Range: -1,999 mV – 1,999 mV

  • Net Weight: 0.35 lb (0.16 kg)

  • Parameter: pH / ORP

  • pH accuracy (±): 0.01

  • pH measuring range: 0 – 14

  • pH resolution: 0.01

  • Power: 4 AAA (LR03) Batteries (Included)

  • Resolution (Voltage): 1 mV

  • Temperature compensation: Automatic

  • Temperature resolution: 0.1 °C

  • Temperature Sensor: 30 KΩ NTC

  • Working Environment: 41°F – 104°F, 80% RH, Non-condensing (5°C – 40°C, 80% RH, Non-condensing)
  • Free Shipping: Available across 48 continental USA. Extra charges may apply for residential, farm, or rural areas.
  • Express Shipping: Overnight and faster shipping options available at additional costs. Quotes obtainable via email.
  • Delivery Time: Typically 5 to 7 business days, varying by location and external conditions.
  • Tracking Information: Provided via email upon shipment. Accessible through account login. Additional information available upon request.
  • Return Policy: 15-day return period for unused, original condition products. A 25% restocking fee applies. Buyer covers original and return shipping costs.
  • Customer Support: Contact at (661) 888-1919 or for queries or concerns about shipping.